Hi everybody!
Can anybody familiar with Linhof Super Technica IV help me out with one issue. I just got my first LF camera and it seems to me that when I try to do a lens rise via adjusting knob on the bottom left side (looking at camera from the front), it does not get fixated and unrolls to initial position when left alone. Is that normal or should it hold in place? Just wondering what's missing there to hold it. on the counterpart there is just a plan a sprocket with an axis going from one side to another. in the middle of the axis there is some kind of a barrel with a ledge on a camera side - looks like these two should do the job of holding the position steadily.

Sorry if I missed anything on the rules of the forum, it's my first message here.